Hello Jain, you can try UV/O3 treatment under Hg lamp of wavelength of 185 and 273nm for 3 min to 5 min.

Dear Saha,

You could use a "piranha" solution (concentrated sulfuric acid and hydrogen peroxide). See DOI: 10.1016/j.jcis.2020.09.033.

Regards.

Hello Shrey Jain

A simple strategy to modify the chemical composition of glasses, SiO2-based, its based on HF treatment. You can try expose your samples at HF vapor (This procedure beyond simples is danger, attention!).

You can form a little amount of HF using the reaction between H2SO4 and KF.

A small stoichiometric amount is enough to evolve a sufficient amount of gas to increase glass wettability. You should do this procedure with gloves and goggles, in a chapel under an exhaust fan. Wettability can be measured by advancing the contact angle of the surface and water.

See this:

Can anyone suggest a method to vary the wettability of the substrate?

https://www.researchgate.net/post/Can_anyone_suggest_a_method_to_vary_the_wettability_of_the_substrate